23.Conductors.A spherical conducting shell enclosesother conductors as shown with the indicated net charges.If the outer surface of the spherical shell has a charge of-2Qat electrostatic equilibrium, what is the net chargeof the heart-shaped conductor?A.+QB.-QC.+2QD.-2QE.24.E from V.The electric potential in a certain region is given by the functionV(x, y, z) =2x-xz2+x2y2. Which of the following is the electric field at any point within the region?A – 8
First Long ExamSecond Semester, AY 2015–2016Physics 72For the next two items, consider the equipotential lines of two chargesq1andq2as shown.25.Nature.Which of the following correctly describes the nature of the two charges?26.Work.What is the minimum work required for an external force to move a+2 nCchargefrom point X to point Y?For the next two items, consider a rod with charge+Qbent into a semicircle of radiusRasshown.A – 9
First Long ExamSecond Semester, AY 2015–2016Physics 7227.Elements.What is the electric potential at the origin due to the bent rod?A.+2kQRB.+kQRC.+2kQR2D.+kQR2E.28.Free Fall.If a point charge+qis initially at the origin, what is the work done by theelectric fieldin bringing the point charge to(0,-R)and then back to the origin?For the next three items, consider the network of capacitors shown. The potential differenceacrossabis30 V.29.Equivalent Minion.What is the equivalent capacitance of this network?30.What a Qt!What is the total charge stored by this network?31.Voltes 3.5.What is the potential difference across the3.5-nFcapacitor?A – 10
First Long ExamSecond Semester, AY 2015–2016Physics 7232.Double D!A30-μFcircular parallel-plate capacitor is connected to a9-Vbattery and has astored charge of270μC. If the separation distance is doubled while the capacitor remainedconnected to the battery, what would be the new charge on the plates?33.DYEL?ectric.Two identical capacitors with capacitanceC0are connectedto a potential differenceVas shown. If a material with dielectric constantκis inserted betweenoneof the capacitors, what is the charge differenceQf-Qibetween the final and initial configurations of the setup?